Drill.



H. P. DYSON.

DRILL. APPLlCATI ON FILED JULY 27.1915.

1,222,938. Patented Apr. 17, 1917.

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WITNESS N @FTQ.

HERBERT P. DYSON, OF KNOXVILLE, TENNESSEE, ASSIGNOR TO ATLAS POWDER GOM- PANY, OF WILMINGTON, DELAWARE, A C ORPORATION OF DELAIVABE.

DRILL.

Specification of Letters Patent.

Patented Apr. 17, 1917.

Application filed July 27, 1915. Serial No. 42,127.

To all whom it may concern:

Be it known that I, HERBERT P. DrsoN, a citizen of the United States, and a resident of Knoxville, in the county of Knox and State of Tennessee, have invented certain new and useful Improvements in Drills, of which the following is a specification.

My invention relates to an improvement in drills; and particularly drills of such construction that they can be used for the purpose of making holes in the earth to receive an explosive charge for blasting.

Heretofore considerable difficulty and inconvenience have been encountered in blasting for ditches and in similar operations, because the presence of moisture in the ground has frequently resulted in the hole for the explosive chargefilling up after the drill has been withdrawn and before the charge has been inserted. This has especially been found to be the case with land that is being drained for farming. Such ground is seldom hard enough to enable a satisfactory hole to be made therein with ordinary implements.

It is the principal object of my invention to overcome the drawback mentioned, and I attain the end sought after by means of a bar and a casing that can be driven into the ground together, and withdrawn separately;

the bar being taken out first, leaving the casing in the hole and preventing .the same from filling up until the explosive has been placed in position.

In this specification I describe and define in the appended claim a preferred embodiment of my invention; but it is to be understood that changes in the embodiment thus disclosed can be made within the scope of my claim, as particularly indicated by variations in the phrasing of the claim, without departing from the spirit of my inven tion.

Referring to the drawings, whereon the same characters of reference are used to indicate thesame parts throughout the several views,

Figure 1 shows how my invention is utilized to place the explosive in soft, moist ground.

Fig. 2 is a longitudinal sectional View showing the parts of my drill assembled in readiness to be driven into the ground.

Fig. 3 is a view of the inner bar; and

Fig. 4 is a longitudinal sectional View of the casing which receives said bar and serves to line the hole after the same has been made; 1.

My improved drill comprises an inner bar 1 and an enveloping casing 2, in which the bar 1 is adapted to be inserted by way of the outer or rear end of the casing 2. The bar has its forward end pointed as indicated by the numeral 3; and the adjacent end of the casing 2 is beveled as shown at 4:. By the term forward] I mean the end of the'bar or casing which goes first into the earth, as will be understood. The rear end of the bar 1 is provided with a flange or collar 5; and when the collar 5 contacts with the rear end of the casing the beveled end 4. of the casing will be in such a position as to form a continuation of the conical surface of the pointed end 3; whereby the least possible friction will be encountered when the hole is being made.

The casing 2 is encircled adjacent its rear end by means of a collar or sleeve 6 made fast to the casing and provided with handles 7, these handles enabling the casing to be withdrawn after the cartridge has been pushed down into the hole and made ready to be ignited. The bar 1 is given such shape and dimensions as to cause it to fit the inside of the casing snugly and leave no room for earth or stones to lodge between the bar and the1 casing adjacent the forward end of the dri 1.

In practice the bar is inserted into the casing and the bar and casing then driven together into the ground by force applied to the rear end of the bar. Ordinarily it issufficient for the operator to take hold of the bar above the collar and then lift the bar repeatedly and strike the to-p'of the casing with the collar 5 on the bar 1. In this way the casing can easily be driven into moist earth to the required depth. Under exceptional conditions, as when harder earth is encountered, the casing and the barcan be driven in by means of blows applied to. the rear end of the bar with a mallet or sledge; the collar 5 on the bar 1. in this case also pushing the easing into the earth as deeply as is desired. Hence by means of my drill a hole can very conveniently be made, as inserve as a lining therefor to prevent the sides of the hole from caving in and thus filling up the space. Next, a charge of suitable size and power is pushed down through the casing 2 by any suitable implement, such as a stick; and as soon as the charge 8 reaches the bottom of the hole, the casing can be grasped by the handles 7 and Withdrawn.

f course, the charge Will have a fuse or detonator Wires attached to it and long enough to extend up out of the hole and the rear end of the casing; and as soon as the casing is clear of the hole the'explosive charge can be tampeddown or packed if desired. When the charge is detonated the explosion necessarily follows and an eXcavationis the consequence. It is understood, of course, that as many charges Will be used as are needed in order to make a ditch of the depth and length required for the operatons purpose.

From the above description it will be seen. that my. invention comprises only tWo parts, and is not only simple and cheap in construction, but also exceedingly easy to operate; and perfectly adapted to secure all the advantages Which are aimed at. One of its chief merits resides in the fact that the operator does not need to carry a mallet or sledge with him when he Wants to use the drill.

Having described my invention, What I believe to be new, and desire to secure and protect by Letters Patent of the United States is:

A drill comprising a driving tube, and a driving core to extend loosely and completely through and project both below-and above said tube, said core having a driving point at its lower end and acollar above the tube to abut and serve as a hammer onthe upper end. of the tube, the core projecting substantially above said collar'to serveas a hammer handle.

Signed at Knoxville in the county of Knox. and State of Tennessee this 12th day of July, A. D. 1915.

HERBERT P. DYSON.

YVitnesses:

WALTER D. DE VAULT,. J. W. SKELLY.

Copies 01 this patent may be obtained for five cents each, by addressing the. Commissioner of Patents,

Washington, D. G. 

